Ubuntu Security Notice 5459-1 - Aurélien Aptel discovered that cifs-utils invoked a shell when requesting a password. In certain environments, a local attacker could possibly use this issue to escalate privileges. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. It was discovered that cifs-utils incorrectly used host credentials when mounting a krb5 CIFS file system from within a container. An attacker inside a container could possibly use this issue to obtain access to sensitive information. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS.
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Ubuntu Security Notice USN-5459-1
June 02, 2022
cifs-utils vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
Summary:
Several security issues were fixed in cifs-utils.
Software Description:
- cifs-utils: Common Internet File System utilities
Details:
Aurélien Aptel discovered that cifs-utils invoked a shell when requesting a
password. In certain environments, a local attacker could possibly use this
issue to escalate privileges. This issue only affected Ubuntu 18.04 LTS and
Ubuntu 20.04 LTS. (CVE-2020-14342)
It was discovered that cifs-utils incorrectly used host credentials when
mounting a krb5 CIFS file system from within a container. An attacker
inside a container could possibly use this issue to obtain access to
sensitive information. This issue only affected Ubuntu 18.04 LTS and Ubuntu
20.04 LTS. (CVE-2021-20208)
It was discovered that cifs-utils incorrectly handled certain command-line
arguments. A local attacker could possibly use this issue to obtain root
privileges. (CVE-2022-27239)
It was discovered that cifs-utils incorrectly handled verbose logging. A
local attacker could possibly use this issue to obtain sensitive
information. (CVE-2022-29869)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS:
cifs-utils 2:6.14-1ubuntu0.1
Ubuntu 21.10:
cifs-utils 2:6.11-3.1ubuntu0.1
Ubuntu 20.04 LTS:
cifs-utils 2:6.9-1ubuntu0.2
Ubuntu 18.04 LTS:
cifs-utils 2:6.8-1ubuntu1.2
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5459-1
CVE-2020-14342, CVE-2021-20208, CVE-2022-27239, CVE-2022-29869
Package Information:
https://launchpad.net/ubuntu/+source/cifs-utils/2:6.14-1ubuntu0.1
https://launchpad.net/ubuntu/+source/cifs-utils/2:6.11-3.1ubuntu0.1
https://launchpad.net/ubuntu/+source/cifs-utils/2:6.9-1ubuntu0.2
https://launchpad.net/ubuntu/+source/cifs-utils/2:6.8-1ubuntu1.2